System Sensor DH200PL - Manual (Page 4)

[6] Field Wiring Installation Guidelines
All wiring must be installed in compliance with the
National Electrical Code and the local codes having juris-
diction. Proper wire gauges should be used. The conduc-
tors used to connect smoke detectors to control panels and
accessory devices should be color-coded to prevent wiring
mistakes. Improper connections can prevent a system from
responding properly in the event of a fire.
For signal wiring, (the wiring between detectors or from
detectors to auxiliary devices), it is usually recommended
that single conductor wire be no smaller than 18 gauge.
The duct smoke detector terminals accommodate wire
sizes up to 12 gauge. The last foot (0.3m) of conduit should
be flexible conduit (available in electrical supply houses),
which facilitates easier installation and puts less strain on
the conduit holes in the housing. Solid conduit connections
may be used if desired.
Smoke detectors and alarm system control panels have
specifications for Signaling-Line Circuit (SLC) wiring.
Consult the control panel manufacturer’s specifications for
wiring requirements for the particular model control panel
being used before wiring the detector loop.
The DH200PL detector is designed for ease of wiring. The
housing provides a terminal strip with clamping plates.
Wiring connections are made by stripping about
3 ⁄
8
-inch
(9mm) of insulation from the end of the wire, sliding the
bare end under the plate, and tightening the clamping plate
screw.
Two LEDs on each duct smoke detector may light, if pro-
grammed by the system control panel, to provide a local,
visible indication. Remote LED annunciator capability is
available as an option. Each duct smoke detector can only
be wired to one remote accessory.
Different panel manufacturers offer different feature sets
across their different panel models. As a result, certain
features of the DH200PL may be available on some control
panels, but not on others. The possible features available
in the DH200PL, if supported by the control panel are:
1. Panel controls the LED operation on sensor. Operational
modes are RED blink, RED continuous, and off.
2. The remote output of the RA400Z follows the condition
of the duct smoke detector LED.
Please refer to the operation manual for the UL listed
control panel for specific operation of the DH200PL.
Wiring Instructions
Disconnect power from the communication line before
installing the DH200PL duct smoke detector.
Wire the DH200PL duct smoke detector per the Control
Panel Installation Manual and Figures 9, 10 or 11.
Set the desired address on the sensor board address code
wheel switches (see Figure 7
D200-38-00 4 I56-1976-004R
3. From inside the duct, couple the other sections of the
sampling tube to the section already installed using the
1 ⁄
2
-inch (12mm) conduit fittings supplied. Make sure
that the holes on both of the sampling tubes are lined
up and facing into the air flow.
4. Trim the end of the tube protruding through the duct so
that 1″ to 2″ (25 to 50mm) of the tube extend outside
the duct. Plug this end with the end plug and tape closed
any holes in the protruding section of the tube. Be sure
to seal the duct where the tube protrudes.
NOTE: An alternate method to using the ST-10 is to use
two ST-5 inlet tubes. Remove the flange from one
of the tubes and install as described above. After
the installation, use electrical tape to close off
some of the sampling holes so that there are a
total of 10 to 12 holes spaced as evenly as possible
across the width of the duct.
NOTE: Air currents inside the duct may cause excessive
vibration, especially when the longer sampling
tubes are used. In these cases a 3 inch (75mm)
floor flange (available at most plumbing supply
stores) may be used to fasten the sampling tube to
the other side of the duct. When using the flange/
connector mounting technique, drill a 1-inch to
1
1 ⁄
4
-inch (25 to 32mm) hole where the flange will
be used.
[5] Install The Filters
To install the sampling tube filters, simply push the filters
into the sampling and exhaust tube holes, as shown in
Figure 6. If a metal sampling tube is used, install the filters
into the tube end.
CAUTION
Filters require periodic cleaning or replacement, depend-
ing on the amount of dust and dirt accumulated. Visually
inspect the filters at least quarterly; inspect them more
often if the dust accumulation warrants it. See Section
[9.1.2] for more information. Replacement filters can be
ordered (filter P/N F36-09-11).
Figure 6. Sampling tube filter installation:
H0459-00